AIC1739 300mA Low Dropout Linear Regulator n FEATURES n DESCRIPTION Low Dropout Voltage of 180mV at 100mA The AIC1739 is a 3-pin low dropout linear Output Current (3.0V Output Version). regulator. The superior characteristics of the l Guaranteed 300mA Output Current. AIC1739 include zero base current loss, very l Internal 1.3Ω low dropout voltage, and 2% accuracy output l P-MOSFET Draws no Base Current. voltage. Typical ground l Low Ground Current at 55µA. approximately l 2% Accuracy Output Voltage of 1.8V/ 2.0V/ maximum loading conditions. Dropout voltage 2.5V/ 2.7V/ 3.0V. is exceptionally low. Output current limiting l Input Voltage Range up to 12V. and thermal limiting are built in to provide l Needs only 1µF for Stability. maximal protection to the AIC1739 against l Current and Thermal Limiting. fault conditions. 55µA, current from no remains load to The AIC1739 comes in the popular 3-pin n APPLICATIONS SOT-89 and TO-92 packages. l Voltage Regulator for CD-ROM Drivers. l Voltage Regulator for LAN Cards. l Voltage Regulator for Microprocessor. l Wireless Communication Systems. l Battery Powered Systems. n TYPICAL APPLICATION CIRCUIT VIN VOUT AIC1739 V IN + 1µ F C IN GND V OUT + 10µ F C OUT Low Dropout Linear Regulator Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC DS-1739-01 TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1739 n ORDERING INFORMATION AIC1739-XCX ORDER NUMBER PACKAGING TYPE X: SOT89 ZT: TO92 ZL: TO92 OUTPUT VOLTAGE 18: 1.8V 20: 2.0V 25: 2.5V 27: 2.7V 30: 3.0V PIN CONFIGURATION AIC1739-18CX AIC1739-20CX AIC1739-25CX AIC1739-27CX AIC1739-30CX (SOT-89) FRONT VIEW AIC1739-18CZT AIC1739-20CZT AIC1739-25CZT AIC1739-27CZT AIC1739-30CZT (TO-92) TOP VIEW AIC1739-18CZL AIC1739-20CZL AIC1739-25CZL AIC1739-27CZL AIC1739-30CZL (TO-92 L TYPE) 1: VOUT 2: GND 3: VIN 1 2 3 1 1: GND 2: VIN 3: VOUT 2 3 TOP VIEW 1 1: VIN 2: GND 3: VOUT 2 3 n ABSOLUTE MAXIMUM RATINGS Input Supply Voltage ...................................................… … … … ..… … .................. -0.3~12V Operating Junction Temperature Range .....… … … ........… … … … ................ -40°C~ 85°C Storage Temperature Range ....................… … ......................… … … .............. -65°C~150°C Power Dissipation SOT-89 Package ....… ...… ................. 0.5W TO-92 Package .....… … … … ............. 0.5W n TEST CIRCUIT Refer to the TYPICAL APPLICATION CIRCUIT n ELECTRICAL CHARACTERISTICS (Ta=25°C, CIN=1µF, C OUT=10µF, unless otherwise specified.) PARAMETER Output Voltage Output Voltage Temperature Coefficiency TEST CONDITIONS No Load AIC1739-30 AIC1739-27 AIC1739-25 AIC1739-20 AIC1739-18 (Note 1) VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V MIN. TYP. MAX. UNIT 2.940 2.646 2.550 1.960 1.764 3.000 2.700 2.500 2.000 1.800 50 3.060 2.754 2.550 2.040 1.836 150 V PPM/°C 2 AIC1739 n ELECTRICAL CHARACTERISTICS (Continued) PARAMETER Line Regulation TEST CONDITIONS IL=1mA Load Regulation (Note 2) Current Limit (Note 3) TYP. MAX. UNIT VIN=4.0~12V 3 10 mV VIN=5V, IL=0.1~300mA 7 25 mV VIN=5V, VOUT=0V Dropout Voltage (Note 4) Ground Current Note 1: Note 2: Note 3: Note 4: MIN. 320 440 mA AIC1739s AIC1739-30 AIC1739-27 AIC1739-25 AIC1739-20 AIC1739-18 IL=0.1mA IL=300mA IL=300mA IL=300mA IL=300mA IL=300mA 0.2 540 570 610 820 920 10 640 670 710 970 1070 mV IO=0.1mA~IMAX VIN=4~12V 55 80 µA Guaranteed by design. Regulation is measured at constant junction temperature, using pulse testing with a low ON time. Current limit is measured by pulsing a short time. Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the value measured with a 1V differential. n TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Response Dropout Voltage vs Load Current 1000 900 800 Dropout Voltage (mV) COUT=1µF V OUT=1.8V V OUT=2.0V VOUT =3.0V VOUT 700 100mV/DIV 600 500 400 V OUT =2.5V 300 IOUT=150mA VOUT=2.7V IOUT VOUT =3.0V 200 IOUT=0.1mA 100 0 0 50 100 150 200 Load Current (mA) 250 300 Time (0.5mS/DIV) 3 AIC1739 n TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Line Transient Response Load Transient Response COUT =1µ F I L=1mA C OUT =10µF VIN =6V 20mV/DIV VOUT=3.0V VOUT VIN VIN =4.0V IOUT=150mA I OUT =0.1mA VOUT VOUT=3.0V I OUT 20mV/DIV Time (1mS/DIV) Time (0.5mS/DIV) Recommended max. Output Current vs. Input voltage 400 Dropout Voltage (mV) 350 300 3.0V 2.7V 2.5V 250 200 1.8V 2.0V 150 100 50 0 3 4 5 6 7 8 9 10 11 12 Input Voltage (V) n BLOCK DIAGRAM VIN VOUT CURRENT LIMITING ERROR AMP - - + THERMAL SHUTDOWN 1.235V Reference GND 4 AIC1739 n PIN DESCRIPTION VOUT PIN - Output pin. GND PIN - Power GND. VIN PIN - Power Supply Input. n APPLICATION INFORMATIONS A 1µF (or greater) capacitor is required between value of this capacitor may be increased without the AIC1739 output and ground for stability. limit. Without this capacitor the part will oscillate. Even though most types of capacitor may work, the A 0.1µF capacitor (or greater) should be placed equivalent series resistance (ESR) should be held from the AIC1739 input to ground if the lead to 5Ω or less if Aluminum electrolytic type is used. inductance between the input and power source Many Aluminum electrolytics have electrolytes exceeds 500nH (approximately 10 inches of trace). that freeze at about -30°C, so solid tantalums are recommended for operation below -25°C. The n PHYSICAL DIMENSIONS l SOT-89 (unit: mm) A D D1 C H E L B e e1 SYMBOL MIN MAX A 1.40 1.60 B 0.36 0.48 C 0.35 0.44 D 4.40 4.60 D1 1.62 1.83 E 2.29 2.60 e 1.50 (TYP.) e1 3.00 (TYP.) H 3.94 4.25 L 0.89 1.20 SOT-89 MARKING Part No. AIC1739-18 AIC1739-20 AIC1739-25 AIC1739-27 AIC1739-30 Marking AY18 AY20 AY25 AY27 AY30 5 AIC1739 l TO-92 (unit: mm) A E L C e1 D SYMBOL MIN MAX A 4.32 5.33 C 0.38 (TYP.) D 4.40 5.20 E 3.17 4.20 e1 L 1.27 (TYP.) 12.7 - 6